The aim is to shoot down as many 'drones' as you can in the arena you play in. If the number or living drones exceeds 10, you lose. The drones appear at random places at regular intervals. Colliding with a drone also ends your life.
The arena is enclosed by walls and you start at its center. You have got limited number of bullets to kill the drones. You can replenish your ammo by picking up ammo packets that appear as yellow spheres with stripes.
The bottom of the screen shows you the game statistics.